Please suggest bookshelf with best bass response under $4000 pr.


Lately, I've been craving deeper, tighter bass. I'd like to hear some ideas for replacing my Silverline 17.5 monitors. Is this a stupid question, due to inherent limitations of driver size imposed by typical bookshelf dimensions, or might I actually do better with another speaker? Amplification is Wells Audio 150 watt SS Majestic integrated. Source is aging Jolida JD100 tubed cdp (in new year, I plan to replace this with another SS cdp or a transport/standalone dac combo). Thanks ! 
stuartk

Proac's as someone mentioned already. 

 AudioNote AN speakers are all stand mounts and the AN-E's go very deep indeed (effective bandwidth from 18 Hz to 23 kHz at -6 dB) The smaller AN J's go to about 25hz If your patient you can get the AN-E Lux in your price range and the J's are new starting in your price range.

PMC have some very good small speakers with transmission lines that go fairly low as well.    

I'll second Dynaudio for big punchy bass out of a small box. I'll also throw in the Guru QM10/2. Really fun and great voiced little speaker with lots of bass. Dynaudio will play louder. 

The Totem Mani-2 used to have the most impressive bass I've heard out of a monitor-sized box.

None of their current stand-mount options are specified below 40 Hz.


I nominate williemj for post of the week...or maybe the month!  Nothing more to be said. 
The laws of physics remain what they are. You cannot get deep bass out of a small box and small drivers. The more you push low frequency extension, the higher the distortion. Of course technology marches on, but only slowly. In my own case, I recently replaced the LS3/5a monitors in my study by their most modern descendants, the Harbeth P3ESR. The modern sibling does indeed have more extended bass, and better bass as well (and not just bass - these are truly great speakers), but even so, it is nothing like a true full range speaker. Not in terms of low frequency extension, and not in terms of dynamic potential.
If you want deep bass there are only two possibilities. The first is new full range speakers. The second is subwoofers. As it so happenend I have a B&W PV1d subwoofer in my main system, and one day I decided to experiment and combine it with the little Harbeths. The match was easy to achieve and the sound was spectacularly unreal. You think all that deep bass is coming out of these two litle boxes. The extra power from the sub also gave some more dynamics, even though it still did not quite fill the large main listening room that I was using for the experiment.
So if you are happy with your current mini monitors, I think the subwoofer route is the way to go. If you decide to do this, I have two recommendations, and they both concern room modes. Room modes are the real problem of low frequency reproduction, and they have to be addressed if you want a good integration, and want to avoid boomy and woolly one tone bass. I think you would need to do two things. The first is to use multiple (small) subs - at least two and perhaps more, to smoothen response. See here for an introduction: http://www.acousticfrontiers.com/20101029using-multiple-subwoofers-to-improve-bass-the-welti-devanti...
Have a look at the Audiokinesis Swarm system: http://www.theabsolutesound.com/articles/audiokinesis-swarm-subwoofer-system/
The second would be to add room equalization like the Antimode 8033: http://www.theabsolutesound.com/articles/dspeaker-anti-mode-8033-dsp-subwoofer-equalizer-tas-204/ I have one and I am very pleased.
Combine multiple subs with room eq, and you have the best of what is possible in a domestic context.
However, if you are using mini monitors because your room is very small, forget about all this, and just learn to live with what you have. How large is your room?
I'd check out the Dynaudio Confidence C1. I heard a pair once, and was absolutely astonished that so much deep, controlled bass could come from such a (relatively) small stand-mount.

Theoretically a smaller driver with greater excursion can go deep but at the expense of sensitivity.  Ports or transmission line can extend frequency response down as well.  There's no substitute for a big driver in a big box, though.  In my experience you can never get the same visceral impact from small speakers, with or without a sub, that you can get from big ones.  If you're determined to try, the best way to go is active.  Active bass is better.  I consider an 8" driver to be the smallest driver that can begin to give a satisfying punch and go deep enough to not sound wimpy or low resolution on music with siginificant bass content.

Is there some reason you absolutely can't have floorstanders?  Small floorstanders with a pair of 7 or 8" woofers will have a far better chance of satisfying you than another bookshelf speaker.  If you've got your SIlverlines on stands the amount of floorspace taken up will be about the same.  

Neat isobaric (Momentum, Ultimatum) bookshelf speakers have excellent bass for the size. Both can be found used for under 4k. ProAc Response floor standing models also have very solid bass and they sound great with the Wells Majestic. The footprint is no larger than a good bookshelf speaker stand. 
I just found an a'gon ad for monitors with this claim: 

"The __________ are full range Studio Monitors that will
provide the entire frequency range, therefore, eliminating the need of using a subwoofer which cannot be fully integrate with speakers".

I wasn't aware such performance was even possible. Any thoughts ? ? ?